updated 5/10/2010 1:07:18 PM ET 2010-05-10T17:07:18

Shares of some top biotechnology companies are up at noon:

Amgen rose $1.19 or 2.2 percent, to $55.65.

Biogen Idec rose $.79 or 1.6 percent, to $51.18.

Celgene rose $1.18 or 2.1 percent, to $58.67.

Gilead Sciences rose $.07 or .2 percent, to $38.44.

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